Oh man I fried my much larger slh plants at that strength. Which brand nutrients do you run? Lucas? Mine are primarily Blue Planet 3 part with all the fixings and these two from CX Hydroponics called Wilt Guard and Regen-a-Root with a bit of Cal-Mag. You are right, I was getting Nitrogen toxicity at 700ppm but I am betting I could run that strength if I could pinpoint which component pushes the Nitrogen to unacceptable ranges. In my last top off I held back on Liquid Seaweed and VitaBlue b/c they were both adding supplemental Nitrogen and were both unnecessary. Plants are liking the jump in ppm - I'm doing a res change today and am going to follow the same general ratio and up the ppm again.
That sprout though - I realize this now, I foliar feed my plants once a day. That's also a new strain for me, seems much heartier than my SLH and a terrible comparison since its in a different medium entirely haha.
